Yuav Ua Li Cas Xaiv Thiab Tswj Qhov Ntau Thiab Zoo Ntawm Polycarboxylate superplasticizer?

Polycarboxylate high-kev ua tau zoo superplasticizersyog txawv kiag li ntawm tsoos superplasticizers. Txawm tias tsawg npaum li cas, lawv tuaj yeem faibhigh fluidityua pob zeb thiab tuavtsawg viscositythiab zoopoob ruaj khovntawm qis dej-cement ratios. Lawv kuj qhia tau zoo duakev sib raug zoonrog cov khoom sib txawv. Yog li ntawd,high-kev ua tau zoo pob zeb, precast tivthaiv pob zeb, pob zeb hauv cov kav hlau, self-compacting pob zeb, prestressed pob zeb, thiabdej ntshiabyog txhua yam haum rau polycarboxylate high-performance superplasticizers.

Raws li kev paub txog kev lag luam, cov hauv qab no yog cov teeb meem zoo sib xws thiab kev tshuaj xyuas ntawm lawv cov laj thawj thaum siv ntau npaum li cas ntawm superplasticizers ua tau zoo los tsimhigh-strength, high-kev ua tau zoo pob zeb:

1. Vim lubqis rhiab heevthiab dav saturation point ntawm npaum superplasticizers,overdosagetuaj yeem tshwm sim tau yooj yim. Thaum lwm yam kev mob nyob tas mus li, overdosage ntawm superplasticizer yog sib npaug rau cov ntsiab lus dej ntxiv. High-strength pob zeb yog tsis tshua muaj rhiab heev rau cov dej-cement ratio, ua rau nws nquagtxwv lub zog loj hloblos yog txawmtsis muaj kev loj hlobnyob rau theem tom ntej.
2. Cov txheej txheem ib txwm siv rau kev ua tau zoo superplasticizers tsim los ntawm cov tuam ntxhab yog tsim los rauqis zog qibntawm pob zeb, thiab lawvretarding cov khoomkuj yog tsim rau cov khoom siv cementitious tsawg dua. Thaum cov tshuaj ntau ntxiv rau cov pob zeb muaj zog, qhov twg cov ntsiab lus ntawm cov cementitious yog qhov siab, nws tuaj yeem yooj yim.ncua lub sijhawm teem sijhawmntawm cov pob zeb, muaj peev xwm ua raukev teeb tsa tsis tiav, uas adversely cuam tshuam raukev txhim kho lub zogntawm cov pob zeb.
3. Piv nrog rau kev ua tau zoo superplasticizers, kev ua tau zoo superplasticizers feem ntau muajpluag compatibility, uas tuaj yeem ua rau txo qisflowabilityntawm cov pob zeb sib xyaw thiab cov teeb meem zoo, xws li kev sib txuam tsis zoo thiab los ntshav, thaum kawg ua rauqis zogthiabdurabilityntawm cov pob zeb.
4. Cov28- hnub compressive zogntawm high-performance superplasticizers yog siab dua li ntawm cov superplasticizers npaum li cas, pab txhawb kev loj hlob zoo zog nyob rau lub sij hawm. Yog li ntawd, nws raug pom zoo kom siv cov superplasticizers ua haujlwm siab los tsimhigh-strength, high-kev ua tau zoo pob zeb.

Nrog rau kev txhawb nqa thiab kev siv ntawmnpaj-mixed qhob, muaj kev thov rau cov pob zeb sib xyaw kom muaj kev ua haujlwm zoo tom qabncua kev thauj mus losthiabkhaws ciasij hawm. Yog li, thaum lub sij hawm tsim kho, nws yog advisable xaivslump-retainingthiabRetarding polycarboxylate superplasticizerstxhawm rau tiv thaiv kev poob qis ntau dhau, uas tuaj yeem ua rau muaj teeb meem hauv cov dej los yog cov teeb meem pumpability.

Rauprecast tivthaiv pob zeb, uas tsis xav tau kev thauj mus los ntev lossis kev cia ntev ntev, qhov xav tau rauflowabilitythiablub sij hawm poobntawm cov pob zeb sib tov tsis yog siab. Nws yog advisable sivultra-thaum ntxov zog polycarboxylate superplasticizerskom txo lub sijhawm teeb tsa, ua kom muaj zog thaum ntxov, thiab txhim kho cov tsos zoo, yog li txosteaming lub sij hawm, ncedaim ntawv turnover tus nqi, thiab txuag lub zog.

Vim qhov tseem ceebkev ua haujlwm sib txawvntawm ntau yam additives (xws li superplasticizers, viscosity-txo cov neeg ua haujlwm, xeb inhibitors, thiab lwm yam), feem ntau, cov tuam txhab sib txawv 'polycarboxylate superplasticizers yuav tsum tsis txhob siv ua ke. Thaum superplasticizers los ntawm cov neeg tsim khoom sib txawv, cov qauv, lossis cov khoom sib xyaw ua ke,teeb meem compatibilitytuaj yeem tshwm sim, ua rautxawv txav sijhawmlos yog huab cua ntau dhau hauv cov pob zeb. Thaum siv polycarboxylate superplasticizers los ntawm cov chaw muag khoom sib txawv ntawm tib txoj haujlwm, tej zaum yuav muaj teeb meem ntawmtsis sib xwsntawm cov kev sib tshuam. Yog li ntawd, thaum siv cov chaw tsim khoom sib txawv lossis ntau hom tshuaj ntxiv los ntawm tib lub chaw tsim khoom,kev ntsuam xyuas compatibilityyuav tsum tau ua nyob rau ntawm qhov chaw kom ntseeg tau tias lawv ua tau raws li kev tsim thiab kev tsim kho ua ntej siv.

txawvmineral compositions, sib tov khoom, hom gypsumthiabkoob tshuaj, variations hauvcov ntsiab lus alkalintawm cement, sib txawvcov ntsiab lus carbonnyob rau hauv ya tshauv, nto thaj chaw ntawmsilica fume, siabnplua cov ntsiab lusnyob rau hauv manufactured xuab zeb los yog siabav nplaumnyob rau hauv ntuj aggregates, ntxuav xuab zeb muajflocculants, thiab cov dej rov ua dua tshiab nrog cov huab cua siab tuaj yeem cuam tshuam rau kev ua haujlwm ntawm polycarboxylate superplasticizers.

Thaum ib puag ncig tej yam kev mob xws likub, av noo, kev thauj mus los deb, thiabtwj qhov siabsib txawv thaum lub sij hawm tsim kho, qhov yuav tsum tau rau lubflowabilitythiablub sij hawm poobntawm pob zeb yuav txawv. Hauv cov xwm txheej zoo li no, kev kho kom haum rau covqhob mix design, ntau npaum li cas, thiab hom polycarboxylate superplasticizer yog tsim nyog.

Thaum cov tuam txhab tsim khoom siv pob zeb sivrov siv dua dej, cov ntaub ntawv complex muaj pes tsawg leeg nyob rau hauv lub recycled dej-xws licua-entraining Cheebtsam, Cov ntsiab lus ntawm chloride ion, tag nrho alkalinity, thiabpH- tuaj yeem cuam tshuam cuam tshuam rau cov nyhuv dispersing ntawm superplasticizer. Tsis tas li ntawd, yog tias cov dej rov ua dua yog siv ncaj qha rau hauv kev sib xyaw, qhov concentration ntawm cov khoom sivslurrytuaj yeem cuam tshuam rau kev ua tau zoo ntawm cov pob zeb sib xyaw.

Cov pob zeb tshwj xeebhais txog kev ua vaj tse nrog cov qauv tsim tshwj xeeb lossis cov kev cai tshwj xeeb. Txij li cov kev xav tau ntawm cov pob zeb sib txawv, cov ntaub ntawv siv kuj yuav txawv. Yog li ntawd,kev ntsuam xyuas compatibilityyuav tsum tau siv cov ntaub ntawv tiag tiag los txiav txim siab npaum li cas thiab hom polycarboxylate superplasticizers.

Hais txog kev sib xyaw ua ke ntawm polycarboxylate superplasticizers nrog lwm cov khoom siv ntxiv, qee cov ntaub ntawv qee zaus tham txog cov txiaj ntsig zoo thaum siv hauv qee qhov kev faib ua feem. Txawm li cas los xij, cov pov thawj rau cov lus xaus no tseem tsis tau paub meej; yog li ntawd, txoj cai no tsis pom zoo cov kev coj ua.